Segment Information, Geographic and Product Data (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Geographic Data
Net sales	$ 643.7	$ 539.9	$ 431.1	$ 414.1	$ 483.6	$ 464.2	$ 375.6	$ 351.7	$ 2,028.7	$ 1,675.1	$ 1,198.6
Long-lived assets	924.6				662.9				924.6	662.9
United States
Geographic Data
Net sales									1,364.2	1,163.7	829.5
Long-lived assets	901.7				646.8				901.7	646.8
Canada
Geographic Data
Net sales									52.1	36.6	31.6
Long-lived assets	9.8				6.9				9.8	6.9
Europe
Geographic Data
Net sales									375.9	277.4	194.6
Long-lived assets	6.9				5.9				6.9	5.9
Mexico
Geographic Data
Net sales									68.8	67.1	49.3
Long-lived assets	1.6				1.6				1.6	1.6
Asia Pacific
Geographic Data
Net sales									142.1	110.7	82.9
Long-lived assets	4.6				1.7				4.6	1.7
Other
Geographic Data
Net sales									$ 25.6	$ 19.6	$ 10.7